is 2 6936253 - 1
has 2088021 decimal digits
takes 1.512 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LFE478E3F3C099E4Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272137.874768.0556%20000002588493605.05696.9795%142.931670.2851%2.2296%
PrimeNet2630.230163.4921%280007000000.02043.1612%0.250564.6462%1.1541%
GPU722674.283965.6716%450009000000.02902.2372%4.312866.4396%0.7680%
Difference+5+133.5908+2.3839%+1955000+257949360+5.0280+4.7423%+138.6188+3.8455%+1.4616%

Known prime factors:
No known factors for M6936253

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-08-31T00:00:00ANONYMOUSv4_computers3000030000---0.009--0.234%
2011-09-03T20:12:00Carsten Kossendeymother44000013310000---0.361--3.506%
2021-06-02T21:12:45Dylan DelgadoManual testing6300001890000012---0.514--3.948%
2021-12-06T14:43:45Seth_TrManual testing2000000258849360---5.057--6.979%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-08-30T00:00:00ANONYMOUSv4_computers21261--0.044--
1998-09-06T00:00:00ANONYMOUSv4_computers21262--0.089--
2005-03-06T00:00:00ANONYMOUSv4_computers21263--0.230--
2014-02-09T10:11:00NesowaManual testing263264--0.283--
2014-02-16T23:05:00lycornManual testing264265--0.539--
2015-06-26T13:39:00VictordeHollanderManual testing265266--1.077--
2016-04-05T22:46:22Gordon SpenceManual testing266267--2.155--
2018-02-27T00:21:32-Anonymous-Manual testing267268--4.309--
2020-04-24T07:21:06TJAOIManual testing268269--8.619--
2021-07-24T15:00:45takahashiManual testing269270--17.24--
2021-08-11T16:33:07SRBaseManual testing270271--34.48--
2021-09-26T07:27:00SRBaseManual testing271272--68.95--


ECM factoring results:
Total ECM effort:1.989 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.989


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-12T00:00:00ANONYMOUSv4_computersFE478E3F3C099E4F1.512
2001-09-30T00:00:00ANONYMOUSv4_computersFE478E3F3C099E4F1.512


PRP results:
No PRP results for M6936253


P-1 factor-bounds graph:
B1 = 2000000, B2 = 258849360 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 630000, B2 = 18900000 (P-1 stage 2)
B1 = 440000, B2 = 13310000 (P-1 stage 2)
B1 = 630000 (P-1 stage 1)
B1 = 440000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-12-06T14:43:45+00:00